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Home Business in Washington County, OR (2026)

4 county-level rules, plus city-specific rules for 2 cities in Washington County, Oregon.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Washington County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Zoning & Home Occupation Permits

Washington County requires a home occupation permit, renewed every year, before any home-based business operates in the unincorporated area. The permit tier limits how much of the dwelling the business can occupy, from 600 square feet for a Type I use up to 1,000 square feet for a Type III use on a five-acre AF-5 or AF-10 parcel.

Washington County Home Occupation Zoning Rules

Some Restrictions

Washington County Community Development Code §§ 430-63.1(A)-(C), 430-63.3(A)-(B), (L)

[§430-63.1] A.Require the applicant to obtain a permit that shall be renewed annually;B.Be operated entirely within the applicant's dwelling. Use of outdoor areas is not allowed;C.Including storage of materials and products, occupy:(1)Not more than 600 square feet or 25% of the dwelling, whichever is greater; or(2)An area exceeding the above maximums by up to 10%, when requested by an applicant...

Signage Rules

A home-based business in unincorporated Washington County may display exactly one identification sign. In a residential, agricultural, or forest district the sign is capped at 2 square feet; in a commercial or industrial district it can be as large as 20 square feet, under the county's home occupation standards.

Washington County Home Business Sign Limits

Light Restrictions

Washington County Community Development Code § 430-63.1(D)-(E)

D.In a residential, agricultural, or forest district, limit any external evidence of an occupation to one identification sign not to exceed 2 square feet in area. Business identification on a commuter vehicle is exempt from this requirement;E.In a commercial or industrial district, limit any external evidence of a home occupation to one identification sign not to exceed 20 square feet in area;

Customer Traffic Restrictions

In unincorporated Washington County, a home-based business's daily walk-in customer count is capped by which of three home occupation permit types it holds. A Type I permit allows five customers a day; Type II and Type III permits allow nine. The Review Authority can approve more for a business owner with a disability.

Washington County Home Occupation Customer Limits

Some Restrictions

Washington County Community Development Code §§ 430-63.1(H), 430-63.2(K), 430-63.3(I)

[§430-63.1] H.Not have more than five customers daily entering the premises; [§430-63.2] K.Not have more than nine customers daily entering the premises. The Review Authority may permit additional customers for an applicant with a disability when the increase is necessitated by the applicant's disability; [§430-63.3] I.Have no more than nine customers daily entering the premises. The Review Aut...

Home Daycare

Home-based day care in Washington County's rural AF-10, AF-5 and RR-5 zoning districts is allowed as a Type II use under CDC § 430-53.4, capped at fewer than 16 children including the provider's own, and requires a recorded waiver acknowledging normal farm and forest activity nearby.

Washington County Family Day Care Home Rules

Some Restrictions

Washington County Community Development Code § 430-53.4

Family Day Care Provider in the AF-10, AF-5 and RR-5 Districts: A day care (child care) provider who resides in the home and regularly provides day care (child care) in the provider's home in the family living quarters to fewer than 16 children, including children of the provider, regardless of full-time or part-time status. Family day care providers shall meet the following:A.All state licensi...

Home Business by City in Washington County

2 cities in Washington County have their own home business rules. Each link goes to that city's dedicated page with code citations.

All Washington County ordinances

See every category we cover for Washington County: parking, noise, fences, fires, animals, pools, and more.

Washington County Ordinance Hub →